Lithium pack building?

I want to make a 4s4p pack out of 18650 cells.  I am asking a lot of questions and doing a lot of research online before buying the parts so I know it will all work when I order the parts.  

My first question is, should I make the pack out of 18650 cells with individual protection or all connected to one PCM?  With protected cells all I need to do is connect the charger and the cells will charge and cut off at the right time?  This is the charger I want to get.  Maybe if I used protected cells I should charge them by taking them out of the pack and charging them in 4x wall chargers like this one.  

Say I didn't use cells with individual protection.  I have my eye on this PCM . It has a balance control function.  I can see the benefit of balancing cells in a 4s1p configuration but does balancing work properly in a 4s4p configuration when 4 cells are acting as one?  

Lastly I want to make the pack user serviceable so I will use battery holders.  I saw some here but it would cost over 50 dollars for all the holders.  That seems too expensive.  Do you know of cheaper ones?  

Thank you for your input

-Jacob

supramp5 years ago
What is it you are trying to power, and what size pack, voltage and amperes? im geussing something along the lines of 14.8V, 4.4 to 5.2 Ah?